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Home >> Chrysler >> 2011 >> 300 Base, Gas >> Repair and Diagnosis >> External Pages >> Different car >> Section 86 (5.7L - DTCS P2128 To U1418 - NGC - 3500 Cab & Chassis) >> Diagnosis and Testing >> P2273-O2 Sensor 2/2 Signal Stuck Rich >> When Monitored:

When Monitored:

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With the engine running, vehicle speed above 96 kph (60 mph), throttle open for a minimum of 120 seconds, ECT greater than 70 C (158 F), catalytic converter temperature greater than 600 C (1112 F), and downstream oxygen sensor in a rich state. During a decel fuel shutoff event, the downstream oxygen sensor should switch from rich to lean within a specific time.